Siemens IEEE802.11 Tutorial page 9

IP based network architecture
193.175.26.92
www
http
N-DATA.request
tcp
ip
link
phy
ip = connectionless,
WLAN-IEEE802.11 Tutorial (Maximilian Riegel), 021018-wlan-tutorial.ppt
N-DATA
ip ip
link link
phy phy
non-reliable,
end-to-end,
packet-oriented
data delivery service
N-DATA N-DATA
ip ip
link link link
phy phy phy
1 2
Version Length Type of Service
)/$*6
Identification
Time-to-live Protocol
Source IP Address (32bit)
Destination IP Address (32 bit)
Options (if any)
Data
131.34.3.35
www
http
N-DATA.indication
tcp
ip ip ip
link link
phy phy
3 4
Total Length TOS
(pre-diffserv)
Fragment offset
D T
Header checksum
D: Delay
T: Throughput
R: Reliability
"1"= precedent
Page 9 © Siemens, 2002
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